package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import io.swagger.annotations.ApiOperation;
import io.swagger.models.auth.In;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PutMapping;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

/**
 * 订单
 */
@Service
@Slf4j
public class OrderServiceImpl implements OrderService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    @Autowired
    private WebSocketServer webSocketServer;

    /**
     * 用户下单
     *
     * @param ordersSubmitDTO
     * @return
     */
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //异常情况的处理（收货地址为空、购物车为空）
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null) {
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);

        //查询当前用户的购物车数据
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        if (shoppingCartList == null || shoppingCartList.size() == 0) {
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        //构造订单数据
        Orders order = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO,order);
        order.setPhone(addressBook.getPhone());
        order.setAddress(addressBook.getDetail());
        order.setConsignee(addressBook.getConsignee());
        order.setNumber(String.valueOf(System.currentTimeMillis()));
        order.setUserId(userId);
        order.setStatus(Orders.PENDING_PAYMENT);
        order.setPayStatus(Orders.UN_PAID);
        order.setOrderTime(LocalDateTime.now());

        //向订单表插入1条数据
        orderMapper.insert(order);

        //订单明细数据
        List<OrderDetail> orderDetailList = new ArrayList<>();
        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(order.getId());
            orderDetailList.add(orderDetail);
        }

        //向明细表插入n条数据
        orderDetailMapper.insertBatch(orderDetailList);

        //清理购物车中的数据
        shoppingCartMapper.deleteByUserId(userId);

        //封装返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(order.getId())
                .orderNumber(order.getNumber())
                .orderAmount(order.getAmount())
                .orderTime(order.getOrderTime())
                .build();

        return orderSubmitVO;
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        paySuccess(ordersPaymentDTO.getOrderNumber());
        return null;

    }


    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);
        //通过websocket向客户端浏览器推送消息
        Map map=new HashMap();
        map.put("type",1);//来单提醒
        map.put("orderId",orders.getId());
        map.put("content","订单号："+outTradeNo);
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }

    /**
     * 用户端分页查询
     * @param pageNum
     * @param pageSize
     * @param status
     * @return
     */
    @Override
    public PageResult pageOuery4User(int pageNum, int pageSize, Integer status) {
       PageHelper.startPage(pageNum,pageSize);
       OrdersPageQueryDTO ordersPageQueryDTO=new OrdersPageQueryDTO();
       ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
       ordersPageQueryDTO.setStatus(status);
       //分页条件查询
        Page<Orders> page=orderMapper.pageQuery(ordersPageQueryDTO);
        //查询订单明细，并且封装
        List<OrderVO> list=new ArrayList<>();
        if(page!=null&&page.getTotal()>0){
            for(Orders orders:page){
                OrderVO orderVO=new OrderVO();
                BeanUtils.copyProperties(orders,orderVO);
                //查询订单明细
                List<OrderDetail> orderDetailList=orderDetailMapper.getByOrderId(orders.getId());
                //封装订单明细
                orderVO.setOrderDetailList(orderDetailList);
                list.add(orderVO);

            }
        }
        return new PageResult(page.getTotal(),list);


    }

    /**
     * 查看订单详情
     * @param id
     * @return
     */
    public OrderVO details(Long id) {
        Orders orders=orderMapper.getById(id);
        List<OrderDetail> orderDetailList=orderDetailMapper.getByOrderId(id);
        //封装订单明细
        OrderVO orderVO=new OrderVO();
        BeanUtils.copyProperties(orders,orderVO);
        orderVO.setOrderDetailList(orderDetailList);
        return orderVO;

    }

    /**
     * 用户取消订单
     * @param id
     */
    public void userCancelByOrderId(Long id) {
        Orders order=orderMapper.getById(id);
        //检验订单是否存在
        if(order==null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);

        }
        //订单的状态
        if(order.getStatus()>2){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //构造新的订单
        Orders newOrder=new Orders();
        newOrder.setId(id);
        //订单处于接单状态下，将进行退款
        if(order.getStatus().equals(Orders.TO_BE_CONFIRMED)){
            newOrder.setPayStatus(Orders.REFUND);
        }
        //更新订单状态
        newOrder.setStatus(Orders.REFUND);
        //更新订购单状态
        newOrder.setStatus(Orders.CANCELLED);
        newOrder.setCancelReason("用户取消");
        newOrder.setCancelTime(LocalDateTime.now());
        orderMapper.update(newOrder);
    }


    public void repetition(Long id) {
        Long userId=BaseContext.getCurrentId();
        //根据订单id查询当前订单详情
        List<OrderDetail> orderDetailList=orderDetailMapper.getByOrderId(id);
        //将订单详情对象转化成购物车对象
        List<ShoppingCart> shoppingCartList=orderDetailList.stream().map(x->{
            ShoppingCart shoppingCart=new ShoppingCart();
            //将原订单信息复制到购物车对象中
            BeanUtils.copyProperties(x,shoppingCart,"id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());

            return shoppingCart;
        }).collect(Collectors.toList());
        //将购物车对象批量插入购物车表中
        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    /**
     * 订单搜索
     * @param ordersPageQueryDTO
     * @return
     */
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        //开始分页
        PageHelper.startPage(ordersPageQueryDTO.getPage(),ordersPageQueryDTO.getPageSize());
        Page<Orders> page=orderMapper.pageQuery(ordersPageQueryDTO);
        //部分订单，需要返回菜品信息
        List<OrderVO> orderVOList=getOrderVOList(page);
        return new PageResult(page.getTotal(),orderVOList);
    }

    /**
     * 不同订单数量统计
     * @return
     */
    public OrderStatisticsVO statistics() {
        Integer toBeConfirmed=orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);//待派送
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);//派送中
        //封装数据
        OrderStatisticsVO orderStatisticsVO=new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;

    }

    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders=Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();
        orderMapper.update(orders);

    }

    /**
     * 拒单
     * @param ordersRejectionDTO
     */
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) {
        Orders orders=orderMapper.getById(ordersRejectionDTO.getId());
        //订单只有待接单状态可以拒接单
        if(orders==null||!orders.getStatus().equals(Orders.TO_BE_CONFIRMED)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //如果已经支付需要退款
        Integer payStatus=orders.getPayStatus();
        if(payStatus.equals(Orders.PAID)){
            log.info("拒单，退款：{}元",orders.getAmount());
        }
        //更新订单状态，拒接原因和取消原因
        Orders newOrder=new Orders();
        newOrder.setId(orders.getId());
        newOrder.setStatus(Orders.CANCELLED);//已经取消
        newOrder.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        newOrder.setCancelTime(LocalDateTime.now());
        orderMapper.update(newOrder);
    }

    /**
     * 商家取消订单
     * @param ordersCancelDTO
     */
    public void cancel(OrdersCancelDTO ordersCancelDTO) {
        Orders orders=orderMapper.getById(ordersCancelDTO.getId());
        //如果已经支付，需要退款
        Integer payStatus=orders.getPayStatus();
        if(payStatus.equals(Orders.PAID)) {
            log.info("商家取消订单，退款：{}元", orders.getAmount());
        }
        //更新订单状态，取消原因
        Orders newOrder=new Orders();
        newOrder.setId(orders.getId());
        newOrder.setStatus(Orders.CANCELLED);
        newOrder.setCancelReason(ordersCancelDTO.getCancelReason());
        newOrder.setCancelTime(LocalDateTime.now());
        orderMapper.update(newOrder);
    }

    /**
     * 派送订单
     * @param id
     */
    public void delivery(Long id) {
        //根据id查询订单
        Orders orders=orderMapper.getById(id);
        //校验订单
        if(orders==null||orders.getStatus().equals(Orders.CONFIRMED)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //更新订单状态
        Orders newOrder=Orders.builder()
                .id(id)
                .status(Orders.DELIVERY_IN_PROGRESS)
                .build();
        orderMapper.update(newOrder);
    }

    /**
     * 完成订单
     * @param id
     */
    public void complete(Long id) {
        Orders orders=orderMapper.getById(id);
        if(orders==null||!orders.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders newOrder=orders.builder()
                .id(id)
                .status(Orders.COMPLETED)
                .build();
        orderMapper.update(newOrder);
    }

    /**
     * 用户催单
     * @param id
     */
    public void reminder(Long id) {
        //查询订单是否存在
        Orders orders=orderMapper.getById(id);
        if(orders==null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        //基于wescoket实现催单
        HashMap map=new HashMap();
        map.put("type",2);
        map.put("orderId",id);
        map.put("content","订单号:"+orders.getNumber());
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }


    /**
     * 获取订单信息
     * @param page
     * @return
     */
    private List<OrderVO> getOrderVOList(Page<Orders> page){

        List<OrderVO> orderVOList=new ArrayList<>();
        List<Orders> ordersList=page.getResult();
        if(!CollectionUtils.isEmpty(ordersList)){
            ordersList.forEach(orders -> {
                OrderVO orderVO=new OrderVO();
                BeanUtils.copyProperties(orders,orderVO);
                String orderDishes=getOrderDishesStr(orders);
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            });
        }
        return orderVOList;
    }

    /**
     * 获取订单信息字符串
     * @param orders
     * @return
     */

    private String getOrderDishesStr(Orders orders) {
        //查询订单详信息
        List<OrderDetail> orderDetailList=orderDetailMapper.getByOrderId(orders.getId());
        //将每一条信息拼接
        List<String> orderDishList=orderDetailList.stream().map(x->{
            return x.getName()+"*"+x.getNumber()+";";
        }).collect(Collectors.toList());
        //将所有信息拼接
        return String.join("",orderDishList);

    }


}
